1. **Application scenarios**
Circulating fluidized bed boilers are widely used in many industries and fields, mainly including:
- **Power industry**: Especially in cogeneration, industrial boilers and power plants, CFB boilers are used to burn a variety of low calorific value fuels such as coal, biomass, garbage, etc., to generate electricity and provide steam or hot water.
- **Metallurgical industry**: Used for heat energy supply in metallurgical industries such as steel mills and aluminum plants, and achieves efficient energy conversion by burning coke, coal, etc. as fuel.
- **Chemical Industry**: Used in the supply of equipment that requires high temperature and steam in the chemical production process, such as steam heating, power generation, etc., usually using a variety of chemical waste as fuel.
- **Waste Incineration**: Use the calorific value of waste for incineration treatment, reduce the volume of waste and recover energy, and is widely used in waste treatment plants.
- **Biomass Energy**: Biomass fuels (such as straw, wood chips, rice husks, etc.) have low calorific values, and circulating fluidized bed boilers can effectively burn these fuels and provide a stable energy supply.
- **Papermaking Industry**: Waste generated in the papermaking process (such as wood chips, waste paper, etc.) can be used as fuel, and CFB boilers can efficiently burn these wastes to provide necessary steam or heat energy.
- **Sludge Treatment**: In sewage treatment plants and other waste treatment processes, CFB boilers can also be used to incinerate sludge, reduce the volume of sludge and recover heat energy.
2. **Uses**
The main uses of circulating fluidized bed boilers include:
- **Power Generation**: CFB boilers can generate electricity by burning low calorific value fuels such as coal, wood chips, and biomass. It can efficiently convert fuel heat and provide the power supply required by industrial parks, power companies, etc.
- **Heat supply**: In addition to power generation, CFB boilers are also widely used to provide steam and hot water to meet industrial production and heating needs.
- **Waste treatment**: CFB boilers can be used for garbage incineration and sludge treatment, converting waste into heat energy and reducing environmental pollution.
- **Energy saving and emission reduction**: Through efficient combustion technology, CFB boilers can not only reduce energy consumption, but also effectively reduce the emission of harmful gases such as carbon dioxide, nitrogen oxides, and sulfur oxides.
- **Increase energy self-sufficiency rate**: In many industrial production, CFB boilers can reduce the demand for external energy and improve the energy self-sufficiency rate of enterprises through heat recovery of waste and exhaust gas.
3. **Features**
- **High-efficiency combustion**: Through the special design of the circulating fluidized bed, the circulating fluidized bed boiler can achieve complete combustion at a lower temperature, thereby improving combustion efficiency and reducing the occurrence of incomplete combustion.
- **Strong fuel adaptability**: The boiler can adapt to a variety of low calorific value fuels, such as coal, straw, waste, garbage, etc., so it has high flexibility and adaptability when handling different fuels.
- **Low temperature and high efficiency combustion**: Circulating fluidized bed boilers can achieve complete combustion of fuels at lower temperatures, reduce fuel heat loss, and help reduce harmful gas emissions.
- **Reduced pollutant emissions**: Due to the controllable combustion temperature and high combustion efficiency, CFB boilers can effectively reduce the emission of pollutants such as SO₂, NOx, and smoke, and meet environmental protection standards.
- **Flexible adjustment**: The boiler has good load adjustment capabilities and can automatically adjust the working state of the boiler according to changes in fuel and load to ensure stable operation of the system.
- **Long-term stable operation**: The combustion method adopted by the CFB boiler and its automatic control system can ensure long-term stable operation, reducing equipment failures and downtime.
- **Low operating cost**: Due to the efficient combustion of the boiler and its ability to handle a variety of fuels, enterprises can achieve long-term low operating costs by reducing raw material procurement costs and energy consumption.
4. **Advantages**
- **Environmentally friendly**: Circulating fluidized bed boilers can effectively reduce the emission of atmospheric pollutants (such as NOx, SO₂, dust, etc.) through efficient combustion and exhaust gas treatment technology, meet strict environmental protection requirements, and have high environmental protection performance.
- **Efficient and energy-saving**: Through high-temperature combustion and fluidized bed design, CFB boilers can efficiently recover the heat energy in the fuel, convert more heat into useful energy (such as steam, electricity), and reduce energy waste.
- **Wide fuel adaptability**: CFB boilers can adapt to the combustion of various fuels, including low calorific value coal, waste, garbage, biomass, etc., and have strong fuel adaptability.
- **High reliability**: Due to its unique circulating fluidized bed design, the boiler has high operating stability, can cope with changes in different loads and fuel fluctuations, and maintain efficient and stable operation for a long time.
- **Automatic control**: Modern CFB boilers are equipped with intelligent automatic control systems that can monitor the operating status of the boiler in real time, automatically adjust according to actual conditions, reduce manual intervention, and improve operating efficiency.
- **Save floor space**: Compared with traditional coal-fired boilers, CFB boilers are smaller in size, compact in design, and occupy less floor space, making them suitable for various places with limited space.
- **Strong economic efficiency**: Through efficient combustion, multi-fuel adaptability and low emission characteristics, CFB boilers can significantly reduce operating costs, save energy costs for enterprises, and help enterprises comply with environmental regulations.
Summary
Circulating fluidized bed boilers are an efficient, environmentally friendly and energy-saving boiler technology that is widely used in many industries such as electricity, metallurgy, chemical industry, waste incineration, biomass energy, sludge treatment, etc. Its advantages include high combustion efficiency, high energy recovery rate, low emissions, strong fuel adaptability, and high degree of automation. With increasingly stringent environmental protection requirements, CFB boilers will play an increasingly important role in energy conservation, emission reduction, and resource utilization.
